CN111867701A - Filter cloth, bag filter, gas treatment device provided with same, and method for manufacturing filter cloth - Google Patents

Filter cloth, bag filter, gas treatment device provided with same, and method for manufacturing filter cloth Download PDF

Info

Publication number
CN111867701A
CN111867701A CN201980017945.5A CN201980017945A CN111867701A CN 111867701 A CN111867701 A CN 111867701A CN 201980017945 A CN201980017945 A CN 201980017945A CN 111867701 A CN111867701 A CN 111867701A
Authority
CN
China
Prior art keywords
adsorbent
filter cloth
filter
catalyst
activated carbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201980017945.5A
Other languages
Chinese (zh)
Inventor
胜木将利
铃木匠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of CN111867701A publication Critical patent/CN111867701A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/086—Filter cloth, i.e. woven, knitted or interlaced material of inorganic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B01D53/83—Solid phase processes with moving reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28028—Particles immobilised within fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B01J20/321—Polymeric carriers, supports or substrates consisting of a polymer obtained by reactions involving only carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B01J20/3212—Polymeric carriers, supports or substrates consisting of a polymer obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/324—Inorganic material layers containing free carbon, e.g. activated carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • B01J21/063—Titanium; Oxides or hydroxides thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/20—Vanadium, niobium or tantalum
    • B01J23/22—Vanadium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0645—Arrangement of the particles in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1241—Particle diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1291—Other parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20723—Vanadium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20776—Tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/92—Dimensions
    • B01D2255/9202—Linear dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/206—Organic halogen compounds
    • B01D2257/2064—Chlorine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B01D2257/602—Mercury or mercury compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B01D2258/0291—Flue gases from waste incineration plants

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Treating Waste Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Catalysts (AREA)

Abstract

The filter cloth (10) is provided with a single filter cloth base (11) formed of a plurality of fibers, a granular adsorbent (17) containing activated carbon and having Hg adsorption capacity, and a granular catalyst (16) having Hg oxidation promotion capacity. The filter cloth base material (11) has a first surface (12) and a second surface (13) which face opposite sides to each other. The ratio of the density of the catalyst (16) to the density of the adsorbent (17) at a predetermined position on the upstream side (Du) of the second surface (13) is higher than the ratio of the density of the catalyst (16) to the density of the adsorbent (17) at a portion on the downstream side (Dd) of the predetermined position.

Description

Filter cloth, bag filter, gas treatment device provided with same, and method for manufacturing filter cloth
Technical Field
The present invention relates to a filter cloth, a bag filter, a gas treatment device provided with the bag filter, and a method for manufacturing the filter cloth.
The present application claims priority to the present application based on Japanese patent application No. 2018-047004, which was filed on 3, 14, 2018, the contents of which are incorporated herein by reference.
Background
As the bag filter, for example, there is a bag filter described in patent document 1 below. The filter cloth of the bag filter comprises a filter cloth base material formed by a plurality of fibers, and active carbon and a catalyst which are attached to the filter cloth base material. The filter cloth is manufactured in such a manner that activated carbon and a catalyst are present in a mixture in a filter cloth base material and they are uniformly distributed.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 10-066814
Disclosure of Invention
Problems to be solved by the invention
Since activated carbon has an adsorption capacity for Hg, Hg in a gas can be removed using the filter cloth described in the above patent document. However, in the field of gas treatment, efficient removal of Hg is required.
Accordingly, an object of the present invention is to provide a technique capable of efficiently removing Hg in a gas.
Means for solving the problems
In order to achieve the above object, according to one aspect of the present invention,
the filter cloth comprises a single filter cloth base formed by a plurality of fibers, a granular adsorbent containing activated carbon and having Hg adsorption capacity, and a granular catalyst having Hg oxidation promoting capacity. One piece of the filter cloth base material is provided with a first surface and a second surface which face opposite sides with each other. The ratio of the density of the catalyst to the density of the adsorbent at a predetermined position on the upstream side of the second surface as the first surface side is higher than the ratio of the density of the catalyst to the density of the adsorbent at a portion on the downstream side of the second surface as the predetermined position.
In a general activated carbon to which a halide is not added, the higher the divalent mercury concentration is, the higher the mercury adsorption rate is. Conversely, when the divalent mercury concentration is low and the 0-valent mercury concentration is high, the mercury adsorption rate decreases. Therefore, in order to increase the mercury adsorption rate with a normal activated carbon, it is preferable to dispose the normal activated carbon in an environment where the divalent mercury concentration is high.
In the filter cloth of this embodiment, when a mercury-containing gas flows from the upstream side to the downstream side, a large amount of mercury in the gas is converted into divalent mercury by a catalyst that is attached to a large amount at a predetermined position of the filter cloth base. Thereafter, a large amount of divalent mercury is adsorbed by activated carbon attached to a large amount of the downstream side of the predetermined position.
Therefore, in this aspect, the oxidizing ability of the catalyst and the adsorbing ability of the adsorbent can be effectively exhibited, and mercury can be efficiently adsorbed. In addition, the adsorbent of the scheme contains activated carbon, so that the activated carbon can be used for adsorbing dioxin, heavy metals and the like.
Here, the filter cloth may have a region in which a ratio of the density of the catalyst to the density of the adsorbent is gradually decreased toward the downstream side.
In the filter cloth according to any one of the above aspects, the predetermined position may be a position of the first surface.
In the filter cloth according to any of the above aspects, the adsorbent and the catalyst may not be attached to the second surface.
In the filter cloth according to any one of the above aspects, the adsorbent may contain the activated carbon and a halide, the halide being attached to the activated carbon, and granular attached activated carbon being formed from the halide and the activated carbon.
The change in the adsorption rate of mercury with respect to the added activated carbon is small even if the divalent mercury concentration changes, and the adsorption rate substantially coincides with the adsorption rate of normal activated carbon when the divalent mercury concentration is 100 wt%. In addition, since the adsorption rate of a normal activated carbon changes depending on the concentration of mercury, part of the mercury adsorbed when the mercury concentration is high may be desorbed when the mercury concentration is low. On the other hand, if the added activated carbon once adsorbs mercury, the mercury is not removed unless a special treatment is performed.
Therefore, in this embodiment, mercury can be stably adsorbed regardless of the divalent mercury concentration, and desorption of the adsorbed mercury can be suppressed.
In the filter cloth having the attached activated carbon, in the adsorbent, the granular attached activated carbon and the granular activated carbon may be present in a mixture.
In this aspect, by changing the mixing ratio of the granular attached activated carbon and the granular activated carbon, the following can be dealt with: a case where mercury is stably adsorbed regardless of the concentration of 2-valent mercury and desorption of the adsorbed mercury is not desired; and the use time of the adsorbent is increased even if the mercury concentration is increased rapidly for a plurality of times.
In order to achieve the above object, the present invention relates to a bag filter,
the filter includes a filter formed of the filter cloth according to any one of the above aspects, and a bag filter housing accommodating the filter therein. The bag filter housing has an inlet for gas inflow and an outlet for gas outflow. The filter is disposed so as to divide the bag filter housing into a space on the inlet side and a space on the outlet side, and the first surface of the filter cloth base forming the filter faces the space on the inlet side.
In this aspect, the filter cloth forming the filter can capture particulate matter such as dust contained in the gas. In this aspect, the adsorbent contained in the filter cloth can adsorb mercury contained in the gas.
In order to achieve the above object, a gas treatment facility according to an aspect of the present invention includes:
the bag filter, an upstream pipe for guiding a gas from a gas generating source to the inlet of the bag filter, and an adsorbent charging device for charging a granular adsorbent containing activated carbon and having an adsorption capacity of Hg into the upstream pipe.
Here, the gas processing facility may include a concentration meter that detects a concentration of Hg in the gas, and an input amount control device that controls an amount of the adsorbent input from the adsorbent input device into the upstream pipe based on the concentration of Hg detected by the concentration meter.
In addition, the gas treatment facility including the input amount control device includes a downstream pipe connected to the outlet of the bag filter, and the concentration meter can detect the Hg concentration in the gas flowing through the downstream pipe.
In order to achieve the above object, a method for manufacturing a filter cloth according to an aspect of the present invention includes:
a preparation step of preparing a single filter cloth base formed of a plurality of fibers, an adsorbent slurry containing an adsorbent that contains activated carbon and has an adsorption capacity for Hg, and a catalyst slurry containing a particulate catalyst that has an ability to promote oxidation of Hg; an adsorbent spraying step of spraying the adsorbent slurry on a first surface and a second surface of the one filter cloth base material, the first surface being on a side opposite to the first surface, that is, on a downstream side, of the second surface; and a catalyst spraying step of spraying the catalyst slurry toward the downstream side with respect to the first surface after the adsorbent spraying step.
Here, in the method of manufacturing the filter cloth, the catalyst concentration in the catalyst slurry may be higher than the adsorbent concentration in the adsorbent slurry.
Effects of the invention
According to one aspect of the present invention, Hg in a gas can be efficiently removed.
Drawings
Fig. 1 is a cross-sectional view of a filter cloth in an embodiment of the invention.
Fig. 2 is a flowchart showing a manufacturing procedure of a filter cloth according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a filter cloth base in an adsorbent spraying process in one embodiment of the present invention.
Fig. 4 is a cross-sectional view of a filter cloth base in a catalyst spraying process in one embodiment of the present invention.
Fig. 5 is a graph showing a relationship between a divalent mercury concentration and a mercury adsorption rate.
FIG. 6 is a cross-sectional view of a bag filter in an embodiment of the invention.
Fig. 7 is a system diagram of a gas processing facility in an embodiment of the present invention.
Detailed Description
Embodiments of the filter cloth according to the present invention, a bag filter including the filter cloth, and a gas treatment facility will be described with reference to the drawings.
"embodiment of the Filter cloth"
Hereinafter, one embodiment of the filter cloth according to the present invention will be described with reference to fig. 1 to 5.
As shown in fig. 1, the filter cloth 10 of the present embodiment includes a filter cloth base 11 formed of a plurality of fibers, a particulate adsorbent 17, and a particulate catalyst 16 that promotes oxidation of Hg.
The filter cloth substrate 11 has a first face 12 and a second face 13. The first face 12 and the second face 13 face opposite sides to each other. The distance between the first face 12 and the second face 13 is the thickness of the filter cloth substrate 11. Hereinafter, in the thickness direction Dt of the filter cloth base 11, the side of the second surface 13 with respect to the first surface 12 is defined as a downstream side Dd, and the side of the first surface 12 with respect to the second surface 13 is defined as an upstream side Du. In the filter cloth base 11, a gas flow path 14 through which a gas to be treated passes is formed between the plurality of fibers.
Examples of the fibers forming the filter cloth base 11 include glass fibers, polyvinyl fluoride fibers, polyester fibers, polyamide fibers, polyphenylene sulfide fibers, and the like. Among the above fibers, the fibers having high heat resistance are glass fibers and polyvinyl fluoride fibers. The diameter of the fiber is preferably 3 to 15 μm. The fiber may be woven by any of twill weaving, satin weaving, plain weaving, and the like. The gram weight of the cloth as the filter cloth base material 11 is preferably 600 to 1200g/m 2. When the grammage is equal to or higher than the lower limit, the powdery material in the gas can be sufficiently captured, and when the grammage is equal to or lower than the upper limit, clogging can be suppressed.
The average particle diameter of the granular adsorbent 17 is, for example, 1 μm to 50 μm. The granular adsorbent 17 here is granular activated carbon having a function of adsorbing mercury (Hg). As described later, granular attached activated carbon can be used as the granular adsorbent 17. Further, as the granular adsorbent 17, a mixture of granular activated carbon and granular attached activated carbon may be used. The attached activated carbon used herein is a substance in which a halide is attached to granular activated carbon. As the halide added to the activated carbon, for example, bromine (Br) is mentioned.
The average particle diameter of the granular catalyst 16 is, for example, 1 μm to 100. mu.m. The catalyst 16 has a support and an active ingredient. The carrier of the catalyst 16 is a single oxide or a composite oxide containing at least one element selected from titanium (Ti), silicon (Si), aluminum (Al), zirconium (Zr), phosphorus (P), and boron (B). The active component of the catalyst 16 is at least one oxide or a composite oxide of oxides of vanadium (V), tungsten (W), molybdenum (Mo), niobium (Nb), or tantalum (Ta). As the carrier, at least titanium oxide is preferably used. As the active ingredient, at least vanadium oxide is preferably used. All of the active ingredients exemplified above have oxidation ability of various substances including mercury, and dioxin can also be oxidatively decomposed.
The composition of the catalyst 16 is not particularly limited. When the active ingredient is vanadium pentoxide, the active ingredient is preferably 1 to 20 parts by mass per 100 parts by mass of the carrier. When the active ingredient is two components of vanadium pentoxide and tungsten trioxide, the amount of vanadium pentoxide is preferably 1 to 10 parts by mass and the amount of tungsten trioxide is preferably 2 to 25 parts by mass per 100 parts by mass of the carrier.
Both the granular adsorbent 17 and the granular catalyst 16 are attached to one filter cloth substrate 11. In one filter cloth substrate 11, the region in which the particulate adsorbent 17 is distributed does not coincide with the region in which the particulate catalyst 16 is distributed.
A granular catalyst 16 is attached to the first surface 12 of the filter cloth base 11. The amount of the particulate catalyst 16 adhering to the first surface 12 is larger than the amount of the particulate adsorbent 17 adhering to the first surface 12. The amount of deposit here means the mass of deposit per unit area. The amount of deposition of the particulate catalyst 16 gradually decreases from the first surface 12 toward the downstream side Dd, and becomes substantially 0 in the vicinity of the second surface 13. On the other hand, the amount of the particulate adsorbent 17 adhering gradually increases and then gradually decreases from the first surface 12 toward the downstream side Dd, and becomes substantially 0 in the vicinity of the second surface 13. The catalyst 16 and the adsorbent 17 are attached to the inner surface of the gas flow path 14 formed in the filter cloth base 11 between the first surface 12 and the second surface 13.
In other words, in the present embodiment, the ratio of the density of the catalyst 16 to the density of the adsorbent 17 at the predetermined position on the upstream side Du from the second surface 13 is higher than the ratio of the density of the catalyst 16 to the density of the adsorbent 17 at the portion on the downstream side Dd from the predetermined position. The filter cloth 10 of the present embodiment has a ratio-changing region 19, and the ratio of the density of the catalyst 16 to the density of the adsorbent 17 in the ratio-changing region 19 gradually decreases toward the downstream side Dd. In the present embodiment, the predetermined position is the position of the first surface 12. In the present embodiment, the adsorbent 17 and the catalyst 16 are not substantially adhered to the second surface 13. The density of the deposit means the mass of the deposit per unit volume of the filter cloth base 11.
Next, the method for manufacturing the filter cloth 10 described above will be described with reference to a flowchart shown in fig. 2.
First, one filter cloth base 11, an adsorbent slurry containing the adsorbent 17, and a catalyst slurry containing the catalyst 16 are prepared (S1: preparation step). The adsorbent slurry is formed by mixing the granular adsorbent 17 into water. The catalyst slurry is formed by mixing the granular catalyst 16 into water. The concentration of the adsorbent 17 in the adsorbent slurry is preferably lower than the concentration of the catalyst 16 in the catalyst slurry. Specifically, the concentration of the adsorbent 17 in the adsorbent slurry is 5 wt% or more and less than 15 wt%, and the concentration of the catalyst 16 in the catalyst slurry is preferably 15 wt% or more. The concentration of the adsorbent 17 in the adsorbent slurry is more preferably 5 wt% or more and less than 12 wt%.
Next, as shown in fig. 3, the adsorbent slurry is sprayed toward the downstream side Dd on the first surface 12 (S2: adsorbent spraying step). As a result, the adsorbent 17 in the adsorbent slurry adheres to the first surface 12 of the filter cloth base 11 and the inner surfaces of the plurality of gas flow paths 14 of the filter cloth base 11. In the adsorbent spraying step (S2), the amount of the particulate adsorbent 17 adhering gradually increases and then gradually decreases as it goes from the first surface 12 toward the downstream side Dd by adjusting the spraying pressure and the spraying flow rate of the adsorbent slurry, and can be substantially 0 in the vicinity of the second surface 13.
Next, as shown in fig. 4, the catalyst slurry is sprayed toward the downstream side Dd on the first surface 12 (S3: catalyst spraying step). As a result, the catalyst 16 in the catalyst slurry adheres to the first surface 12 of the filter cloth base 11 and the inner surfaces of the plurality of gas flow paths 14 of the filter cloth base 11. However, the catalyst 16 is difficult to enter the deep side of the gas flow path 14, that is, the downstream side Dd, because the adsorbent 17 that has adhered to the inner surface of the plurality of gas flow paths 14 of the filter cloth base 11 serves as an obstacle, and the concentration of the catalyst 16 in the catalyst slurry is higher than the concentration of the adsorbent 17 in the adsorbent slurry. Accordingly, a large amount of catalyst 16 in the catalyst slurry adheres to the first face 12 of the filter cloth substrate 11. The excess catalyst 16 in the catalyst slurry adheres to the upstream Du portion of the inner surface of the plurality of gas flow paths 14.
As described above, the adsorbent spraying step (S2) is performed, and then the catalyst spraying step (S3) is performed, whereby the distribution of the granular adsorbent 17 and the distribution of the granular catalyst 16 in one filter cloth base 11 are the distributions described above.
Subsequently, the filter cloth base 11 to which the adsorbent 17 and the catalyst 16 are attached is dried (S4: drying step). As described above, the filter cloth 10 of the present embodiment is completed.
In the preparation step (S1), the step of forming the catalyst slurry may be performed before the catalyst spraying step (S3), and there is no need to perform it before the adsorbing material spraying step (S2).
Next, the effect of the filter cloth 10 described above will be described.
The catalyst 16 has the ability to oxidize species in the gas as previously described. Therefore, when 0-valent mercury is contained in the gas, the catalyst 16 oxidizes the 0-valent mercury to divalent mercury as described below.
Hg0→Hg2++2e-
In the case of ordinary activated carbon in which only activated carbon is used and halide is not added to the activated carbon, as shown in fig. 5, divalent mercury (Hg) is used2+) The higher the concentration of (b), the higher the mercury adsorption rate. Conversely, the lower the divalent mercury concentration is, the more 0 valent mercury (Hg) 0) The higher the concentration of (3), the lower the mercury adsorption rate. Therefore, in order to increase the mercury adsorption rate with a normal activated carbon, it is preferable to dispose the normal activated carbon in an environment having a high divalent mercury concentration.
In the filter cloth 10 of the present embodiment, when a gas containing mercury flows from the upstream side Du toward the downstream side Dd, a large amount of mercury in the gas is converted into divalent mercury by the catalyst 16, which is attached to the first surface 12 of the filter cloth base 11 in a large amount. A large amount of divalent mercury is bonded to chlorine and the like contained in the gas. Thereafter, a large amount of divalent mercury is adsorbed by ordinary activated carbon which is attached to a large amount of the gas flow path 14 of the filter cloth base 11.
It is assumed that the general distribution of the activated carbon and the distribution of the catalyst 16 are substantially uniform in the thickness direction Dt of the filter cloth base material 11. In this case, the activated carbon located at the upstream side Du of the filter cloth base 11 is exposed to an environment having a low divalent mercury concentration, and therefore the mercury adsorption rate is low. Therefore, the filter cloth cannot efficiently adsorb mercury.
On the other hand, in the filter cloth 10 of the present embodiment, since a large amount of the catalyst 16 adheres to the upstream side Du portion of the filter cloth base 11 and a large amount of the adsorbent 17 containing normal activated carbon adheres to the downstream side Dd of the position, a large amount of the normal activated carbon is exposed to an environment having a high divalent mercury concentration. Therefore, the filter cloth 10 of the present embodiment can efficiently adsorb mercury. Further, since the adsorbent 17 of the present embodiment contains activated carbon, it can adsorb harmful substances such as dioxin.
Here, the following two kinds of filter cloths are assumed to be present. The first filter cloth is a filter cloth having two filter cloth base materials, a granular catalyst 16 attached to the first filter cloth base material, and a granular adsorbent 17 attached to the second filter cloth base material. The second filter cloth is a filter cloth in which an adsorbent 17 or a catalyst 16 is stirred into fibers constituting a base material of the filter cloth.
Since the first filter cloth has two filter cloth base materials, the pressure loss of the gas is increased, and the manufacturing cost is high. On the other hand, the filter cloth 10 of the present embodiment is only one filter cloth base 11. Therefore, the filter cloth 10 of the present embodiment can suppress the pressure loss of the gas and can control the manufacturing cost by the first filter cloth.
Since the adsorbent 17 or the catalyst 16 is stirred into the fibers constituting the filter cloth base, the adsorbent or the catalyst does not necessarily exist in the gas flow path in the filter cloth base, and the contact rate of the gas with the adsorbent 17 or the catalyst 16 is low, and the adsorption rate of mercury is low. On the other hand, in the filter cloth 10 of the present embodiment, the adsorbent 17 and the catalyst 16 are adhered to the first surface 12 of the filter cloth base 11 and the inner surface of the gas flow path 14 of the filter cloth base 11. Therefore, the filter cloth 10 of the present embodiment has a higher contact rate of the gas with the adsorbent 17 and a higher contact rate of the gas with the catalyst 16 than the second filter cloth, and can increase the adsorption rate of mercury.
Modification of filter cloth "
The predetermined position in the thickness direction Dt of the filter cloth base 11 of the above embodiment is the position of the first surface 12. However, the predetermined position may be a position on the upstream side Du of the second surface 13, and may be a position between the first surface 12 and the second surface 13.
As methods for producing such a filter cloth, for example, the following two methods are available. In the first method, the concentration of the adsorbent 17 in the adsorbent slurry is made lower than that in the above embodiment, and the concentration of the catalyst 16 in the catalyst slurry is made lower than that in the above embodiment. The spraying pressure of each slurry was further made higher than that of the above embodiment. In the second method, first, the catalyst slurry is sprayed toward the upstream side Du on the second surface 13 of the filter cloth base 11, and then the adsorbent slurry is sprayed toward the upstream side Du on the second surface 13 of the filter cloth base 11. In the second method, a granular catalyst 16 and a granular adsorbent 17 are attached to the second surface 13.
The adsorbent 17 of the above embodiment is only a normal activated carbon. However, as described above, as the granular adsorbent 17, granular attached activated carbon may be used, or a mixture of granular activated carbon and granular attached activated carbon may be used.
As described above with reference to fig. 5, in a typical activated carbon, the adsorption rate of mercury decreases as the concentration of divalent mercury decreases. On the other hand, as shown in the figure, in the case of the attached activated carbon in which a halide is attached to the ordinary activated carbon, even if the divalent mercury concentration changes, the change in the mercury adsorption rate is small, and the adsorption rate substantially matches the adsorption rate of the ordinary activated carbon when the divalent mercury concentration is 100 wt%. In addition, since the adsorption rate of a normal activated carbon changes depending on the concentration of mercury, part of the mercury adsorbed when the concentration of mercury is high may be desorbed when the concentration of mercury is low. On the other hand, if the added activated carbon once adsorbs mercury, the mercury is not removed unless a special treatment is performed.
Therefore, when mercury is stably adsorbed regardless of the concentration of divalent mercury and it is not desired to remove the adsorbed mercury, only granular added activated carbon or a mixture of granular added activated carbon and granular activated carbon having a high mixing ratio can be used as the adsorbent 17. In contrast, in the case where the mercury concentration may suddenly increase a plurality of times, only granular activated carbon may be used or a mixture with granular activated carbon having a low mixing ratio of granular attached activated carbon may be used in order to increase the service life of the adsorbent 17.
Embodiments of the bag Filter "
The bag filter according to the present embodiment will be described below with reference to fig. 6.
The bag filter 20 of the present embodiment includes a plurality of filters 21 formed of the filter cloth of the above-described embodiment or its modified example, a bag filter housing 22 that houses the plurality of filters 21, a filter support member 24, and a discharger 25.
The filter cloth of the embodiment or the modification described above is sewn in a bag shape to form the filter 21. The first surface 12 of the filter cloth base 11 forms an outer surface 21o of the bag-shaped filter 21, and the second surface 13 of the filter cloth base 11 forms an inner surface 21i of the bag-shaped filter 21.
The bag filter housing 22 has an inlet 22i through which gas flows into the interior, and an outlet 22o through which gas flows out of the interior. The inlet 22i is formed in a first side plate 22a of the bag filter housing 22 and the outlet 22o is formed in a second side plate 22b of the bag filter housing 22. A discharge machine 25 is connected to the lower portion of the bag filter housing 22. The discharger 25 is, for example, a rotary valve, and discharges powder such as dust accumulated in the bag filter housing 22 to the outside.
The filter support member 24 is disposed in the bag filter case 22 and supports the plurality of bag-shaped filters 21.
The bag filter housing 22 is partitioned into an inlet-side space 23i and an outlet-side space 23o by the plurality of bag filters 21 and the filter support member 24. The outer surface 21o of the bag-like filter 21 supported by the filter support member 24 faces the inlet-side space 23i, and the inner surface 21i of the filter 21 faces the outlet-side space 23 o. Thus, the first face 12 of the filter cloth base 11 forming the filter 21 faces the space 23i on the inlet side, and the second face 13 of the filter cloth base 11 faces the space 23o on the outlet side.
The bag filter 20 of the present embodiment can capture powder such as dust contained in the gas flowing in from the inlet 22i by the filter 21 and discharge the powder to the outside from the discharger 25. Further, since the bag filter 20 of the present embodiment includes the filter 21 formed of the filter cloth of the above-described embodiment or its modified example, mercury in the gas can be efficiently removed with the filter cloth. The gas passing through the filter 21 is discharged to the outside from the outlet 22 o.
"gas treatment plant embodiment"
Hereinafter, the gas processing facility according to the present embodiment will be described with reference to fig. 7.
The gas treatment facility of the present embodiment includes the bag filter 20 of the above-described embodiment, a plurality of pipes 32 and 33, an adsorbent charging device 34, a gas cooler 35, and a blower 36.
The pipes 32 and 33 include an upstream pipe 32 and a downstream pipe 33. An upstream pipe 32 connects a gas generation source 31 such as a garbage incinerator to the inlet 22i of the bag filter 20. The downstream pipe 33 connects the outlet 22o of the bag filter 20 to the chimney 37. The blower 36 is provided in the downstream pipe 33, sucks the gas in the bag filter 20, and sends the gas to the stack 37.
The adsorbent charging device 34 is connected to the upstream pipe 32. The adsorbent charging device 34 includes a tank 34t in which the granular adsorbent is stored, and a feeder 34f which charges the adsorbent into the upstream pipe 32 from the tank 34 t. The feeder 34f is, for example, a rotary feeder.
The gas cooler 35 is provided in the upstream pipe 32 and is provided on the gas generation source 31 side of the adsorbent charging device 34. The gas cooler 35 lowers the temperature of the gas from the gas generation source 31 to below the heat-resistant temperature of the filter 21.
When the gas generating source 31 is a garbage incinerator, a mercury-containing material containing mercury such as a mercury thermometer may be charged together with other garbage. In many cases, such mercury-containing materials are fed into the waste incinerator at irregular intervals. Therefore, the concentration of mercury in the exhaust gas from the waste incinerator may increase in a spike-like manner. That is, the mercury concentration in the gas discharged from the waste incinerator increases in a very short time and decreases in a very short time. Further, harmful substances such as dioxin are often contained in the gas.
In the gas treatment facility of the present embodiment, a predetermined amount of granular adsorbent is constantly fed from the adsorbent feeding device 34 to the upstream pipe 32. The adsorbent charged into the upstream pipe 32 adsorbs dioxin and the like contained in the gas flowing through the upstream pipe 32. The adsorbent adsorbing dust, dioxin, and the like contained in the gas flowing through the upstream pipe 32 is captured by the filter 21 in the bag filter 20. The dust and the adsorbent captured by the filter 21 are removed from the filter 21, and then discharged to the outside by the discharger 25. Therefore, the adsorbent 17 of the filter 21 is not substantially used for adsorbing mercury, dioxin, and the like.
When the mercury concentration in the gas discharged from the gas generation source 31 increases to a peak, a large amount of mercury cannot be adsorbed by the adsorbent without excessively increasing the amount of the adsorbent constantly charged from the adsorbent charging device 34 to the upstream pipe 32. In the present embodiment, mercury that cannot be adsorbed by the adsorbent of the adsorbent feeding device 34 is adsorbed by the adsorbent 17 of the filter 21 of the bag filter 20.
As described above, in the present embodiment, while the amount of the adsorbent to be charged from the adsorbent charging device 34 is suppressed, the mercury in the gas that increases in a spike shape can be removed.
The adsorbent to be charged from the adsorbent charging device 34 may be only normal activated carbon, only attached activated carbon, or a mixture of normal activated carbon and attached activated carbon, as in the adsorbent 17 contained in the filter 21 of the bag filter 20.
In the above embodiment, a predetermined amount of granular adsorbent is constantly fed from the adsorbent feeding device 34 to the upstream pipe 32. However, the gas treatment facility may be provided with a concentration meter 38 that detects the concentration of Hg in the gas, as shown in fig. 7; and a charging amount control device 39 for controlling the amount of the adsorbent 17 charged from the adsorbent charging device 34 into the upstream pipe 32 based on the Hg concentration detected by the concentration meter 38. When the Hg concentration detected by the concentration meter 38 exceeds a predetermined value, the amount of the adsorbent 17 charged from the adsorbent charging device 34 is increased by the charge control device 39.
The concentration meter 38 may be provided in the downstream pipe 33, or may be provided in the upstream pipe 32 or the chimney 37. When the concentration meter 38 is provided in the downstream pipe 33, at least a part of the gas containing mercury flows into the bag filter 20 at the time when the Hg concentration detected by the concentration meter 38 becomes high. Therefore, even if the amount of the adsorbent charged from the adsorbent charging device 34 into the upstream pipe 32 is increased after the Hg concentration detected by the concentration meter 38 exceeds a predetermined value, the adsorbent can adsorb only a part of the mercury contained in the gas. On the other hand, when the concentration meter 38 is provided in the upstream pipe 32, the gas containing mercury is less likely to flow into the bag filter 20 at the time when the Hg concentration detected by the concentration meter 38 becomes high. Therefore, when the Hg concentration detected by the concentration meter 38 exceeds a predetermined value, the amount of the adsorbent fed from the adsorbent feeding device 34 into the upstream pipe 32 is increased, whereby a large amount of mercury contained in the gas can be adsorbed by the adsorbent. However, if the concentration meter 38 is provided in the upstream pipe 32, the detection end of the concentration meter 38 may be covered with dust or the like, and the mercury concentration may not be continuously detected. Therefore, when the concentration meter 38 is provided in the upstream pipe 32, it is necessary to have a structure in which the detection of the concentration meter 38 is not covered with dust or the like, or a structure in which the dust or the like can be removed even if the detection end is covered with dust or the like.
Industrial applicability
According to one aspect of the present invention, Hg in a gas can be efficiently removed.
Description of the reference numerals
10: filter cloth
11: filter cloth substrate
12: first side
13: second surface
14: gas flow path
16: catalyst and process for preparing same
17: adsorbent and process for producing the same
19: region of varying proportions
20: bag filter
21: filter
21 i: inner face
21 o: outer face
22: bag filter casing
22 a: first side plate
22 b: second side plate
22 i: inlet port
22 o: an outlet
23 i: space on the inlet side
23 o: space at outlet side
24: filter support member
25: discharging machine
31: gas generating source
32: upstream piping
33: downstream piping
34: adsorbent feeding device
34 t: pot for storing food
34 f: feeding machine
35: gas cooler
36: blower fan
37: chimney
38: concentration meter
39: input quantity control device
And Dt: thickness direction
Du: upstream side
And Dd: downstream side

Claims (12)

1. A filter cloth is provided with:
a filter cloth base material formed by a plurality of fibers,
A granular adsorbent containing activated carbon and having an adsorption capacity of Hg, and
a particulate catalyst having the ability to promote the oxidation of Hg,
one piece of the filter cloth base material is provided with a first surface and a second surface which face to opposite sides,
The ratio of the density of the catalyst to the density of the adsorbent at a predetermined position on the upstream side of the second surface as the first surface side is higher than the ratio of the density of the catalyst to the density of the adsorbent at a portion on the downstream side of the second surface as the predetermined position.
2. A filter cloth according to claim 1,
there is a region in which the ratio of the density of the catalyst to the density of the adsorbent becomes gradually smaller toward the downstream side.
3. A filter cloth according to claim 1 or 2,
the predetermined position is a position of the first surface.
4. A filter cloth according to any one of claims 1 to 3,
on the second face, the adsorbent and the catalyst are not attached.
5. A filter cloth according to any one of claims 1 to 4,
the adsorbent comprises the activated carbon and a halide,
the halide is added to the activated carbon,
forming a granular attached activated carbon from the halide and the activated carbon.
6. A filter cloth according to claim 5,
in the adsorbent, the granular attached activated carbon is present in a mixture with the granular activated carbon.
7. A bag filter, comprising:
a filter formed from a filter cloth according to any one of claims 1 to 6, and
a bag filter housing that houses the filter therein,
the bag filter housing has an inlet for gas inflow and an outlet for gas outflow,
the filter is configured as follows: the bag filter housing is partitioned into a space on the inlet side and a space on the outlet side, and the first face of the filter cloth base material forming the filter faces the space on the inlet side.
8. A gas treatment facility is provided with:
the bag filter of claim 7,
An upstream side pipe for guiding the gas from the gas generating source to the inlet of the bag filter, and
and an adsorbent charging device for charging a granular adsorbent containing activated carbon and having an adsorption capacity for Hg into the upstream pipe.
9. The gas treatment apparatus according to claim 8, comprising:
a concentration meter for detecting the concentration of Hg in the gas, and
and a charge amount control device that controls an amount of the adsorbent charged into the upstream pipe from the adsorbent charging device, based on the Hg concentration detected by the concentration meter.
10. The gas processing apparatus according to claim 9,
a downstream pipe connected to the outlet of the bag filter,
the concentration meter detects the Hg concentration in the gas flowing through the downstream pipe.
11. A method for manufacturing a filter cloth, comprising the steps of:
a preparation step of preparing a single filter cloth base formed of a plurality of fibers, an adsorbent slurry containing an adsorbent that contains activated carbon and has an adsorption capacity for Hg, and a catalyst slurry containing a particulate catalyst that has an ability to promote oxidation of Hg;
an adsorbent spraying step of spraying the adsorbent slurry onto a first surface and a second surface of the one filter cloth base material, the first surface being on a side of the second surface opposite to the first surface, the first surface being on a downstream side;
and a catalyst spraying step of spraying the catalyst slurry toward the downstream side with respect to the first surface after the adsorbent spraying step.
12. The method of manufacturing a filter cloth according to claim 11,
the catalyst concentration in the catalyst slurry is higher than the sorbent concentration in the sorbent slurry.
CN201980017945.5A 2018-03-14 2019-03-04 Filter cloth, bag filter, gas treatment device provided with same, and method for manufacturing filter cloth Pending CN111867701A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2018-047004 2018-03-14
JP2018047004A JP7064910B2 (en) 2018-03-14 2018-03-14 Filter cloth, bug filter, and gas treatment equipment equipped with this
PCT/JP2019/008370 WO2019176617A1 (en) 2018-03-14 2019-03-04 Filter cloth, bag filter, gas processing apparatus equipped with same, and method for producing filter cloth

Publications (1)

Publication Number Publication Date
CN111867701A true CN111867701A (en) 2020-10-30

Family

ID=67907645

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201980017945.5A Pending CN111867701A (en) 2018-03-14 2019-03-04 Filter cloth, bag filter, gas treatment device provided with same, and method for manufacturing filter cloth

Country Status (5)

Country Link
EP (1) EP3766563A1 (en)
JP (1) JP7064910B2 (en)
CN (1) CN111867701A (en)
SG (1) SG11202008610RA (en)
WO (1) WO2019176617A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7269865B2 (en) * 2019-10-21 2023-05-09 日立造船株式会社 Exhaust gas treatment device and exhaust gas treatment method
JP2023168092A (en) * 2022-05-13 2023-11-24 三菱重工業株式会社 Exhaust gas treatment system, power generation facility comprising the same, and exhaust gas treatment method
JP7395044B1 (en) * 2023-04-21 2023-12-08 三菱重工環境・化学エンジニアリング株式会社 gas purification filter

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5154888A (en) * 1974-10-18 1976-05-14 Kanebo Ltd
JPH1066814A (en) * 1996-08-28 1998-03-10 Babcock Hitachi Kk Bag filter for treating exhaust gas and its production
JP2003126654A (en) * 2001-10-19 2003-05-07 Sumitomo Heavy Ind Ltd Flue gas treatment apparatus
JP2004148304A (en) * 2002-10-11 2004-05-27 Osaka Gas Co Ltd Dioxins removing filter, and method of removing dioxins and device for treating exhaust gas using the filter
US20050100699A1 (en) * 2002-10-16 2005-05-12 Vincent Durante Filter system
WO2005049203A2 (en) * 2003-03-05 2005-06-02 3M Innovative Properties Company Catalyzing filters and methods of making
EP1598111A1 (en) * 2004-05-15 2005-11-23 Delphi Technologies, Inc. Catalyst concentration gradient in a catalysed filter
CN104428246A (en) * 2012-07-10 2015-03-18 美利肯公司 Activated carbon articles and compositions and process for producing the same
CN104853828A (en) * 2013-01-03 2015-08-19 美利肯公司 Filter for Removal of Heavy Metals
CN106975331A (en) * 2017-04-27 2017-07-25 北京清新环境技术股份有限公司 A kind of smoke catalytic absorbing synergic mercury removal device and its method
JP2017213499A (en) * 2016-05-31 2017-12-07 株式会社タクマ Exhaust gas treatment facility and exhaust gas treatment method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4029029B2 (en) * 2002-12-18 2008-01-09 三井造船株式会社 Bug filter
JP3839450B2 (en) * 2004-10-12 2006-11-01 バブコック日立株式会社 Exhaust gas treatment equipment
JP4582475B2 (en) * 2004-10-26 2010-11-17 日本フエルト株式会社 Felt manufacturing method
US8202482B2 (en) * 2006-07-26 2012-06-19 Babcock-Hitachi Kabushiki Kaisha Apparatus for removing of trace of toxic substance from exhaust gas and method of operating the same
JP2012130853A (en) * 2010-12-21 2012-07-12 Mitsubishi Heavy Ind Ltd Bag filter, and exhaust gas treatment apparatus
JP2018047004A (en) 2016-09-21 2018-03-29 株式会社バンダイナムコエンターテインメント Program and game system

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5154888A (en) * 1974-10-18 1976-05-14 Kanebo Ltd
JPH1066814A (en) * 1996-08-28 1998-03-10 Babcock Hitachi Kk Bag filter for treating exhaust gas and its production
JP2003126654A (en) * 2001-10-19 2003-05-07 Sumitomo Heavy Ind Ltd Flue gas treatment apparatus
JP2004148304A (en) * 2002-10-11 2004-05-27 Osaka Gas Co Ltd Dioxins removing filter, and method of removing dioxins and device for treating exhaust gas using the filter
US20050100699A1 (en) * 2002-10-16 2005-05-12 Vincent Durante Filter system
US20050152821A1 (en) * 2002-10-16 2005-07-14 Vincent Durante Filter system
WO2005049203A2 (en) * 2003-03-05 2005-06-02 3M Innovative Properties Company Catalyzing filters and methods of making
EP1598111A1 (en) * 2004-05-15 2005-11-23 Delphi Technologies, Inc. Catalyst concentration gradient in a catalysed filter
CN104428246A (en) * 2012-07-10 2015-03-18 美利肯公司 Activated carbon articles and compositions and process for producing the same
CN104853828A (en) * 2013-01-03 2015-08-19 美利肯公司 Filter for Removal of Heavy Metals
JP2017213499A (en) * 2016-05-31 2017-12-07 株式会社タクマ Exhaust gas treatment facility and exhaust gas treatment method
CN106975331A (en) * 2017-04-27 2017-07-25 北京清新环境技术股份有限公司 A kind of smoke catalytic absorbing synergic mercury removal device and its method

Also Published As

Publication number Publication date
EP3766563A1 (en) 2021-01-20
JP7064910B2 (en) 2022-05-11
JP2019155295A (en) 2019-09-19
WO2019176617A1 (en) 2019-09-19
SG11202008610RA (en) 2020-10-29

Similar Documents

Publication Publication Date Title
CN111867701A (en) Filter cloth, bag filter, gas treatment device provided with same, and method for manufacturing filter cloth
US20040159235A1 (en) Low pressure drop canister for fixed bed scrubber applications and method of using same
CN102056825B (en) A conveyor for transporting powder, and a method for conveying powder
CA2908177C (en) Method for regenerating denitrification catalyst
JP6567463B2 (en) Exhaust gas treatment method
CN103341294B (en) High-temperature gas filter device and filtering method thereof
WO2004052506A2 (en) Method and apparatus for the abatement of toxic gas components from a semiconductor manufacturing process effluent stream
JP2016209794A (en) Gas treatment equipment
EP1829597B1 (en) Method for treatment of exhaust gas
US8657942B2 (en) Trap device
JP3020948B1 (en) Adsorption type gas scrubber for treating gas generated during semiconductor manufacturing
JP2012223759A (en) Excellent method for utilizing powder adsorbent for mercury control at coal-fired thermal power station
JP3948903B2 (en) Equipment for purifying flue gas containing mercury
JP2019070471A (en) Exhaust gas treatment apparatus and exhaust gas treatment method
JP2019209273A (en) Exhaust gas treatment device
JP2000140546A (en) Device for treating exhaust gas containing dust and treatment of exhaust gas containing dust
JP3201701B2 (en) Method and apparatus for treating particulate dust in semiconductor device manufacturing process
WO2002040136A2 (en) Moving granular bed filters for particulates and contaminants removal
KR200186189Y1 (en) Cyclone filter apparatus
JP4151896B2 (en) Exhaust gas treatment facility and exhaust gas treatment method
JP2012220041A (en) Drying device
JP3491124B2 (en) Filtration type dust collector
JP4008485B1 (en) Exhaust gas filter
TW494006B (en) Harmful gas purifying column and method
JPH08269721A (en) Method for removing dust in exhaust gas of cvd device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20201030

WD01 Invention patent application deemed withdrawn after publication